CDs and DVDs have currently become one of the most popularly used storage mediums across the globe. They are used by everyone ranging from individuals to professionals and also businessmen. A CD, or Compact Disc, is widely used for transferring data and it also serves as a storage medium.In the earlier days, floppy disks were very popularly used as storage medium for saving information. However, it is not an economical storage mode as it has comparatively less storage space (1.44 megabytes). On the other hand, a CD provides huge storage space and is also very efficient to use. Data can be easily and conveniently stored in CDs with the help of CD writer device. A CD writer uses laser lens for digitally storing data on the magnetic film of a CD.CDs have already been in use for many years now and they have proved their efficiency. CD replication is an automated and easy process which involves huge capital expenses for setting up. Today, a number of media companies and production houses have realised the potential of CD replication as it is the cost effective way of producing CDs instead of manufacturing new ones.CD replication process for larger volumes of CDs is usually done with the help of glass master. This glass master is used for creating the “stamper” which moulds the data onto a CD foil. As this process gets completed the data is protected with polycarbonate plastic layers. Once done with this process, the replicated CD is tested and screened for its quality and then it is finally packed for distribution.